CN116058772A - Curved tube, insertion part and endoscope - Google Patents

Abstract

The application discloses a curved tube, an insertion part and an endoscope, and relates to the technical field of medical instruments. The curved tube disclosed in the present application is used in an endoscope, and the curved tube includes a plurality of slits arranged along its axial direction and a plurality of tube unit units divided by the plurality of slits, wherein the width of the plurality of slits is the same, and the plurality of slits Comprising first slits arranged in pairs, the plurality of pipe section units include a first pipe section unit located between the first slits, the first pipe section unit is deformed toward its inner surface side to have a guide groove, and the guide groove is used to set the inner surface The traction rope of the speculum; among the pipe joint units on both sides of the first slit, at least one of the opposite sides is provided with an abutment protrusion, and in the extending direction of the first slit, the abutment protrusion is arranged adjacent to the guide groove. The above solution can make the curved pipe realize a uniform bending shape.

Description

Curved tube, insertion part and endoscope

technical field

The present application relates to the technical field of medical instruments, in particular to a curved tube, an insertion part and an endoscope.

Background technique

With the continuous development of medical technology, endoscopy has been widely used in the diagnosis and treatment of diseases. During the use of the endoscope, the orientation of the front end is adjusted by controlling the bending of the insertion part, so as to obtain image information of the target site.

In related technologies, such as patent CN104023616A, etc., the width of the bending slit close to the operating wire guiding part is narrower than that of other bending slits, so as to increase the minimum curvature radius of the former predetermined section, thereby alleviating the bending tube due to processing operations. Uneven bending problems caused by wire guides. However, the insertion part using the above-mentioned curved tube is still prone to uneven bending during use, and it is difficult to meet the increasing control accuracy requirements.

Contents of the invention

The embodiments of the present application provide a curved tube, an insertion part, and an endoscope, which can realize a uniform bending shape of the curved tube.

In order to solve the above problems, the embodiment of the present application adopts the following technical solutions:

In the first aspect, an embodiment of the present application provides a curved tube for use in an endoscope, the curved tube includes a plurality of slits arranged along its axial direction and a plurality of tube unit units divided by the plurality of slits , wherein the plurality of slits have the same width, the plurality of slits include first slits arranged in pairs, and the plurality of pipe section units include first pipe section units located between the first slits, the The first pipe section unit is deformed toward one side of its inner surface to have a guide groove for setting a traction rope of the endoscope;

Among the pipe joint units on both sides of the first slit, at least one of the opposite sides is provided with an abutment protrusion, and in the extending direction of the first slit, the abutment protrusion is disposed adjacent to the guide groove.

In a second aspect, an embodiment of the present application provides an insertion part, including a traction rope and the curved tube described in the first aspect of the embodiment of the present application, the traction rope is passed through the guide groove.

In a third aspect, an embodiment of the present application provides an endoscope, including a handle and the insertion part described in the second aspect of the embodiment of the present application, the handle is connected to the insertion part.

The technical solution adopted in the embodiment of the present application can achieve the following beneficial effects:

In the curved tube, the insertion part, and the endoscope disclosed in the embodiments of the present application,

First, in the curved tube, the insertion part and the endoscope disclosed in the embodiments of the present application, the abutment protrusions are provided in the first gap, so that the tube unit units on both sides of the first gap can be abutted in advance through the engagement protrusions. In this way, the part of the abutment stroke of the single element of the pipe joint that is increased due to the guide groove in the related art is offset.

At the same time, combined with the feature that the width of each gap on the curved tube is the same, the stiffness distribution of the curved tube along its axial direction is relatively uniform. In the axial direction of the pipe, the pipe joint units are abutted at the same bending angle, and the curvature radii of the left and right areas of each pipe joint unit tend to be consistent, so that the curved pipe can achieve a uniform bending shape.

Second, since the width of each slit of the curved pipe is the same, the stiffness distribution of the curved pipe along its axial direction is relatively uniform, so that the bending ranges of the pipe segment units in the axial direction of the curved pipe are roughly the same, and the curved pipe is The bending deformation in the axial direction tends to be balanced, that is, the stress in the axial direction of the curved pipe is evenly distributed, thereby avoiding stress concentration and prolonging the service life of the curved pipe.

Third, since the width of each slit of the curved pipe is the same, the strength distribution in the axial direction of the curved pipe is relatively uniform, so that weak points of strength on the curved pipe can be avoided, thereby improving the damage resistance of the curved pipe and prolonging the service life of the curved pipe .

Description of drawings

The drawings described here are used to provide a further understanding of the application and constitute a part of the application. The schematic embodiments and descriptions of the application are used to explain the application and do not constitute an improper limitation to the application.

In the attached picture:

Fig. 1 is a schematic diagram of the principle of a bent pipe disclosed in the related art in a bent state;

Fig. 2 is a schematic structural diagram of the insertion part disclosed in the first embodiment of the present application and a partial enlarged view of A;

Fig. 3 is a schematic diagram of the principle of the bent pipe disclosed in the first embodiment of the present application in a bent state;

Fig. 4 is a side view of the insertion part disclosed in the first embodiment of the present application and a partial enlarged view of B;

Fig. 5 is a schematic structural diagram of the insertion part disclosed in the second embodiment of the present application;

Fig. 6 is a partial structural schematic diagram of the curved pipe disclosed in the third embodiment of the present application;

Fig. 7 is a partial structural schematic diagram of the curved pipe disclosed in the fourth embodiment of the present application;

Fig. 8 is a partial structural schematic diagram of the curved pipe disclosed in the fifth embodiment of the present application;

Fig. 9 is a partial structural schematic diagram of the curved pipe disclosed in the sixth embodiment of the present application.

Explanation of reference signs:

100-Curved pipe, 110-First tube unit, 111-Guide groove, 120-Second tube unit, 130-Abutment protrusion, 131-Abutment arc surface, 132-Transition arc surface, 100a-First Gap, 100b-the second slit, 100c-locating groove,

200 - Traction rope.

Detailed ways

In order to make the purpose, technical solution and advantages of the present application clearer, the technical solution of the present application will be clearly and completely described below in conjunction with specific embodiments of the present application and corresponding drawings. Apparently, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of this application.

The technical solutions disclosed in various embodiments of the present application will be described in detail below with reference to the accompanying drawings.

Please refer to Fig. 1 , in related technologies such as patent CN104023616A, it realizes the bending action by processing the slit on the pipe wall of the curved pipe so that the curved pipe passes through the slit. Among them, the position corresponding to the processing of the operation wire guide part on the bending tube will be lower than other parts. In order to avoid the difference in the radius of curvature of different parts of the bending tube caused by the structural layout, the operation wire is guided The widths of the slits on both sides of the portion are set smaller than the other slits, thereby alleviating the problem of differences in the radius of curvature.

However, the above-mentioned related and similar technologies still have the defect that the bending shape of the curved pipe is uneven in practical application. After research, the inventor found that the above-mentioned problem is mainly caused by the gaps with different widths distributed along the axial direction of the curved pipe. of.

Specifically, although the above-mentioned related art can reduce the minimum curvature radius of the predetermined interval before and after the bending slit close to the operation wire guide by reducing the slits on both sides of the operation wire guide, the size of the slit directly affects It corresponds to the stiffness of the part on the curved tube, which leads to an obvious stiffness distribution gradient in the axial direction of the curved tube. As shown in Figure 1, the stiffness of the A' area is significantly greater than that of the B' area. In this case, in the process of pulling the bending tube to achieve the bending action, the parts of the bending tube with different rigidities are likely to cause differences in the bending amplitude (even when the parts on both sides of the slit are in contact), resulting in bending The bending shape of the tube is not uniform.

In addition, the difference in the width of the slit will also cause a difference in the strength of the part on the corresponding curved tube. As shown in Figure 1, the strength of the A' area is significantly greater than that of the B' area, which leads to a lower corresponding strength on the curved tube There is a greater risk of damage to the part.

For this, some embodiments of the present application provide a curved tube for an endoscope.

Referring to Fig. 2 to Fig. 9, the curved pipe 100 disclosed in the embodiment of the present application includes a plurality of slits arranged along its axial direction and a plurality of tube unit units divided by the plurality of slits, wherein the width H1 of the plurality of slits is Similarly, the plurality of slits include first slits 100a arranged in pairs, and the plurality of pipe section units include first pipe section units 110 located between the first slits 100a, and the first pipe section units 110 are deformed toward the inner surface side thereof to have The guide groove 111 is used for setting the traction rope 200 of the endoscope.

It can be understood that the gap can form a deformation space on the curved pipe 100, through which the adjacent pipe unit units can approach each other, so as to realize the relative rotation between the pipe unit units. Viewed in the entire axial direction of the curved pipe 100, many The bending action of the bending pipe 100 can be realized by the cooperation of the pipe joint units.

Since the width H1 of the plurality of slits distributed on the curved tube 100 is the same, it can be ensured that the rigidity and strength of the positions corresponding to the slits on the curved tube 100 are roughly consistent, thereby avoiding the formation of stiffness gradients and Intensity gradient.

The curved tube 100 of the embodiment of the present application has an integrated molding structure. Of course, its specific processing technology is not limited. The gap can be formed by cutting, etching and other technological means. Among them, the cutting technology can be preferably laser cutting technology, which can optimize the processing efficiency. and processing accuracy, the bent pipe 100 after forming has higher overall strength.

Regarding the first slits 100a, being arranged in pairs means that the first slits 100a are adjacently arranged on the curved tube 100 to define a first tube section unit 110 therebetween, and the first tube section unit 110 is used to set the endoscope The guide groove 111.

In the related endoscopic technology, the curved tube 100 realizes the bending action through the traction force exerted by the traction rope 200, and the traction rope 200 is arranged in the guide groove 111, and the guide groove 111 can constrain the traction rope 200, so that the traction rope 200 Assume that the bending pipe 100 is pulled on the path to realize the bending action. The processing of the guide groove 111 is based on the deformation of the pipe wall of the first pipe unit 110, which can usually be realized by stamping and other processes; and under this structural layout, it is easy to implement on the outer surface side of the first pipe unit 110 For processing operations, the working space on this side is larger, thereby reducing the difficulty of processing.

The multiple pipe section units in the embodiment of the present application include a second pipe section unit 120 other than the first pipe section unit 110 , and the second pipe section unit 120 is a pipe section unit without a guide groove 111 . Of course, the plurality of slits in this embodiment of the present application includes a second slit 100b other than the first slit 100a, which is located between two adjacent second pipe section units 120 .

As shown in Figure 2, the pipe unit adjacent to the first pipe unit 110 can be set as the second pipe unit 120, so that the first pipe unit 110 is radially opposite to the traction rope 200 from inside to outside. The second pipe section unit 120 acts as a limiter for the traction rope 200 in the radial direction from outside to inside, and the two can alternately distribute the traction rope 200 in the radial direction of the curved pipe 100 And the reverse limiting effect can optimize the guidance of the traction rope 200 on the preset path. Of course, this embodiment of the present application does not limit this, and multiple first pipe joint units 110 may also be continuously provided in the embodiment of the present application.

Multiple guide grooves 111 matching the same pull rope 200 are usually arranged coaxially to optimize the guiding and limiting effect. Of course, in the embodiment in which the curved pipe 100 is threaded with multiple traction ropes 200 , the curved pipe 100 needs to be provided with multiple sets of guide grooves 111 .

At the same time, at least one of the pipe joint units on both sides of the first slit 100a is provided with an abutment protrusion 130 on the opposite side, and the abutment protrusion 130 is adjacent to the guide groove 111 in the extending direction of the first slit 100a set up.

It can be understood that the two pipe joint units on both sides of the first gap 100a may both be provided with the abutment protrusion 130 , or one of them may be provided with the abutment protrusion 130 . In combination with the foregoing, the two pipe section units on both sides of the first gap 100 a may be the first pipe section unit 110 , or may be the first pipe section unit 110 and the second pipe section unit 120 arranged adjacently.

The "opposite side" refers to the corresponding sides of the two pipe unit units on both sides of the first slit 100a along the axial direction of the curved pipe 100. Abut.

Combining with related technologies including patent CN104023616A, it can be seen that the setting of the guide groove 111 will cause a height difference between two adjacent pipe section units in the radial direction of the curved pipe 100, thus making the two adjacent pipe section units arrive later This is equivalent to increasing the abutting stroke between the pipe joint units, so that the bending angle becomes larger and the radius of curvature becomes smaller, which is one of the reasons why the curved pipe 100 cannot achieve uniform bending.

In the embodiment of the present application, the abutment protrusion 130 is located in the first slit 100a, which can shorten the distance between the two pipe unit units on both sides of the first slit 100a, that is, reduce the distance between the two pipe unit units. The abutting stroke, and because the abutting protrusion 130 is disposed adjacent to the guide groove 111, the effect is more prominent. During the bending process of the curved pipe 100, the abutment protrusion 130 can play a connecting role, which can be expressed as making the pipe unit units on both sides of the first gap 100a abut in advance, thus offsetting the problem caused by the guide groove in the related art. 111 leads to the enlarged part of the abutment stroke between the pipe joint units, so that the bending angle between the two becomes smaller and the radius of curvature becomes larger.

Based on the above layout and through preset dimensions, when the curved pipe 100 is in a bent state, the bending angle between the two pipe section units on both sides of the first gap 100a can be equal to the bending angle between other adjacent pipe section units, And the radius of curvature of the left and right regions of each pipe unit is equal. For details, please refer to FIG. 3 , where the bending angle between the first pipe section unit 110 and its adjacent second pipe section unit 120 is α1, and the bending angle between two adjacent second pipe section units 120 is α2, α1 Equal to α2; the radius of curvature of the left and right areas of the first pipe unit 110 and its adjacent second pipe unit 120 (the two realize relative rotation) is R1, and the curvature radius of the left and right areas of the other second pipe unit 120 is R2 , R1 is equal to R2.

It can be seen that the structural layout characteristics of the curved tube 100 in the embodiment of the present application determine that the curved tube 100 can achieve a uniform bending shape in terms of size design.

On this basis, just because the width H1 of each slit is the same, the stiffness distribution of the curved pipe 100 along its axial direction is relatively uniform, and the bending ranges between the pipe unit units are approximately the same or close, further ensuring that the pipe unit units are Almost the same bending angle achieves abutment, and even if the traction rope 200 continues to apply traction force in the abutting state, since the ability of each pipe section unit to resist elastic deformation is the same or similar, each pipe section unit on the curved pipe 100 continues to bend and deform. The width is also approximately the same, so that the curved tube 100 can be ensured to achieve a uniform bending form.

In contrast to the related technology, as shown in Figure 1, the stiffness of each pipe segment unit of the curved pipe is different, especially the stiffness difference at the slits corresponding to different widths is more obvious, specifically, the stiffness of the A' area is significantly greater than that of the B' The rigidity of the area, which makes the ability of different parts of the curved pipe to resist elastic deformation in the axial direction is different. Then, during the bending process of the curved pipe, the bending form of the curved pipe is: there are already abutted pipe sections There are also non-abutting pipe joint units in the unit. As the traction force applied by the traction rope increases, the pipe joint units that have not been in contact before will rotate to the abutting state, while the pipe joint units that have been in contact before will Continue to rotate relative to excessive bending.

It can be seen that the bent tubes of the related art always have differences in the bending amplitude in the axial direction, so that a uniform bending shape cannot be achieved.

It can be seen from the comparison that the curved tube 100 disclosed in the embodiment of the present application can significantly improve its bending uniformity compared with the related art, so as to realize the uniform bending shape of the curved tube 100 .

Since the bent tube 100 of the embodiment of the present application is bent with substantially the same bending range between the pipe segment units in the axial direction, the stress on the bent tube 100 can be evenly distributed during the bending process to avoid stress concentration, thereby The service life of the curved pipe 100 can be extended.

In addition, the width H1 of the slits arranged along the axial direction on the curved tube 100 is the same, which makes the strength distribution in the axial direction of the curved tube 100 relatively uniform, so that weak points of strength can be avoided on the curved tube 100, thereby improving The anti-damage performance of the curved pipe 100 prolongs the service life of the curved pipe 100 .

It should be noted that the embodiments of the present application do not limit the specific shape of the curved tube 100. In addition to the round tube shown in FIG. 2, it can also be other shapes such as a square tube. According to the actual application situation.

Regarding the extending direction of the slits, as shown in FIGS. 2 to 9 , the slits are arranged along the circumferential direction of the curved tube 100 ;

As shown in FIG. 2 and FIG. 5 , in some embodiments of the present application, the abutting protrusion 130 includes an abutting arc surface 131 disposed on the abutting side thereof.

It can be understood that in order to realize the bending action, the curved pipe 100 itself is a flexible pipe, so that during the bending process of the curved pipe 100, there will be a slight misalignment between the pipe section units, and the abutment protrusion 130 acts as a joint with the pipe section. Where the opposite sides of the unit are in contact, stress concentration is likely to occur when the slight misalignment occurs, resulting in damage to the curved tube 100 .

In this embodiment, the abutment arc surface 131 enables the abutment protrusion 130 to transition smoothly with the abutment surface when the abutment is realized, especially when there is a slight misalignment of adjacent pipe unit units, the abutment protrusion 130 can be avoided. The protrusion 130 is in contact with the abutment surface with a sudden change (for example, there are corners at the end of the square protrusion), so as to prevent stress concentration when the abutment protrusion 130 connects adjacent pipe unit units, and avoid damage to the curved pipe 100 .

In some embodiments of the present application, among the two sides of the abutting protrusion 130 along the extension direction of the first slit 100a, at least one side is provided with a transitional arc surface 132 connected with the corresponding pipe section unit. For example, as shown in FIG. 5 , the first pipe section unit 110 is provided with an abutment protrusion 130 , and the abutment protrusion 130 is provided on the side of the first slit 100a extending away from the guide groove 111 . There is a transition arc surface 132; of course, in another embodiment, the second pipe section unit 120 on the side of the first slit 100a may also be provided with an abutment protrusion 130 having a transition arc surface 132.

It can be understood that, when the curved pipe 100 is in a bent state, the pipe joint units on both sides of the first gap 100a are engaged by the abutting protrusions 130 to achieve abutment, and the parts of the pipe joint units corresponding to the abutting protrusions 130 and The nearby area is a region with high stress, especially where the sudden change in cross-sectional shape is more prone to stress concentration, and the connection between the abutting protrusion 130 and the corresponding pipe unit is the place where the sudden change in cross-sectional shape occurs. In this embodiment, the abutment protrusion 130 is connected to the corresponding pipe section unit through the transition arc surface 132, such a layout makes the connection between the two achieve a smooth transition, thereby avoiding stress concentration and avoiding the bending of the pipe 100. damaged effect.

In some embodiments of the present application, the pipe section units on both sides of the first slit 100a are provided with abutment protrusions 130, and in the extending direction of the first slit 100a, the pipe section units on both sides of the first slit 100a The abutment protrusions 130 are set correspondingly or misplaced. As shown in Figure 6, the abutment protrusions 130 on the first pipe section unit 110 and the second pipe section unit 120 on both sides of the first slit 100a are correspondingly arranged in the extending direction of the first slit 100a; as shown in Figure 7 The abutting protrusions 130 on the first pipe section unit 110 and the second pipe section unit 120 on both sides of the first slit 100a are arranged in an offset direction in the extending direction of the first slit 100a.

It can be understood that, in the embodiment where only one of the pipe joint units on both sides of the first slit 100a is provided with the abutting protrusion 130, when the curved tube 100 is in a bent state, the stress concentration parts in the area of the first slit 100a include The end of the abutment protrusion 130 (corresponding to the opposite side where no abutment protrusion 130 is provided) and the central position of the end of the first slit 100a will inevitably lead to a deviation in the stress distribution of the curved tube 100 in the area of the first slit 100a , which leads to a greater risk of damage to the curved pipe 100 due to internal stress concentration.

In the above embodiment where the abutting protrusions 130 are provided correspondingly, the abutting protrusions 130 protrude from the pipe joint units on both sides of the first slit 100a, that is, the abutting protrusions 130 on both are at the first The abutment stroke of the two pipe joint units is reduced in the gap 100a. In this case, when the two correspondingly arranged abutment protrusions 130 abut, the stress concentration part in the area of the first gap 100a includes two corresponding abutment protrusions. The contact position of the protrusion 130 and the central position of the end of the first slit 100a, it can be seen that under this structural layout, the stress distribution area of the curved tube 100 in the area of the first slit 100a is balanced, thereby reducing the risk of stress concentration damage to the curved tube 100 .

In the above embodiment where the abutting protrusions 130 are dislocated, any pipe unit on both sides of the first gap 100a can abut against the opposite side of another pipe unit through the abutting protrusions 130 thereon, In this way, the number of abutting parts of the pipe unit on both sides of the first slit 100a can be significantly increased when the curved pipe 100 is bent, so that the stress of the first slit 100a and its vicinity can be reduced relative to the extension direction of the first slit 100a. More uniform distribution, thereby reducing the degree of stress concentration of a single abutment part, and achieving the purpose of reducing the risk of damage due to stress concentration.

In the above-mentioned embodiment where the abutment protrusions 130 are dislocated, the heights of the abutment protrusions 130 at different positions in the extending direction of the first slit 100a can be adaptively set so that the abutment protrusions 130 at different positions can Simultaneously achieve contact.

As shown in FIG. 6 , in some embodiments of the present application, the abutting protrusions 130 of the tube unit on both sides of the first slit 100 a are arranged correspondingly, and the heights of the abutting protrusions 130 on both sides are the same.

It can be understood that under such a layout, when the two correspondingly arranged abutting protrusions 130 abut, the stress concentration site in the area of the first gap 100a includes the contact position of the two corresponding abutting protrusions 130 and the end of the first gap 100a. Because the corresponding two abutting protrusions 130 have the same height, the line between the contact position of the two and the central position of the end of the first slit 100a is actually approximately the same as the axis 1 of the first slit 100a. As a result, the stress distribution in the area of the first slit 100a is roughly symmetrically distributed with respect to the axis 1 of the first slit 100a, which obviously prevents the occurrence of a large degree of stress concentration on one side in the area of the first slit 100a, thereby The risk of damage to the curved tube 100 due to stress concentration is greatly reduced.

In some embodiments of the present application, among the pipe unit units on both sides of the first slit 100 a , one of them is provided with the abutment protrusion 130 , and the other is provided with the positioning groove 100 c corresponding to the abutment protrusion 130 . For example, as shown in Figure 8, there are first pipe section unit 110 and second pipe section unit 120 on both sides of the first gap 100a, the first pipe section unit 110 is provided with an abutment protrusion 130, and the second pipe section unit The unit 120 is correspondingly provided with a positioning groove 100c.

It can be understood that, during the bending process of the curved pipe 100 , there is a slight misalignment between the pipe segment units, which will affect the bending stability of the curved pipe 100 . In this embodiment, when the pipe joint units on both sides of the first gap 100a are engaged by the abutment protrusion 130 to achieve abutment, the abutment protrusion 130 will protrude into the positioning groove 100c, and the two are bent The circumferential direction of the tube 100 is limited and matched with each other, which can prevent the abutment protrusion 130 from slipping due to being squeezed, and can also avoid the slight misalignment between the tube unit units, thereby significantly improving the stability of the curved tube 100 during the bending process .

Further, in the embodiment where there are a pair of abutting protrusions 130 correspondingly arranged along the extending direction in the first slit 100a, one of them is provided with a positioning groove 100c at its abutting end. For example, as shown in FIG. 9 , there are first pipe section unit 110 and second pipe section unit 120 on both sides of the first gap 100a, both of which are provided with abutment protrusions 130 , and the second pipe section unit 120 The abutting protrusion 130 is provided with a positioning groove 100c at its abutting end.

It can be understood that under such a layout, the abutting protrusions 130 are arranged in pairs and correspondingly, as mentioned above, can make the stress distribution in the area of the first slit 100a relative to the extending direction more balanced, and at the same time, The positional cooperation between the positioning groove 100c and the abutting protrusion 130 can avoid the slipping of the abutting protrusion 130 and the slight misalignment between the pipe joint units. A uniform bending shape is realized, and it can be seen that the structural layout of this embodiment has achieved multiple beneficial effects.

As shown in Figure 2, on the same pipe joint unit, the abutment protrusions 130 on both sides of the guide groove 111 are distributed symmetrically with respect to the axis O of the curved pipe 100 (specifically, the traction rope 200 can be used as a reference, and the traction rope 200 is roughly along the direction of the curved pipe. 100 axially extending arrangement). It can be understood that, as mentioned above, when the curved tube 100 is in a bent state, the abutment protrusion 130 and its surrounding area belong to the parts with relatively high stress, because the abutment protrusion 130 on both sides of the guide groove 111 is opposite to each other. The distribution is symmetrical about the axis O of the curved tube 100 , so that the stress of the first slit 100 a and its vicinity can be more uniformly distributed relative to the axis O of the curved tube 100 , thereby reducing the risk of stress concentration damage to the curved tube 100 .

As shown in Figure 4, the width of the pipe unit is H2, and the embodiment of the application does not limit the width H2 of the pipe unit, for example, in the embodiment shown in Figure 4, the width H2 of different pipe units can have Various.

In some embodiments of the present application, the width H2 of any two pipe unit units is the same. It can be understood that the width H2 of the pipe section unit directly affects the stiffness and strength of each part of the curved pipe 100 where it is located. In the case where the width H2 of any two pipe section units is the same, the stiffness distribution of the curved pipe 100 along its axial direction can be made And the intensity distribution tends to be uniform, which is more conducive to realizing the uniform bending shape of the curved tube 100 .

Please refer to Fig. 2 to Fig. 9, the embodiment of the present application also provides an insertion part, which includes a traction rope 200 and the curved tube 100 described in any of the aforementioned schemes, the insertion part has the beneficial effect of the aforementioned curved tube 100, here No longer.

Wherein, the traction rope 200 is passed through the guide groove 111 , and the guide groove 111 plays a role of guiding the traction rope 200 along the axial direction of the curved pipe 100 . During the process of pulling the curved pipe 100 to realize the bending action by applying traction force through the traction rope 200, the pipe joint units on both sides of the first slit 100a are engaged by the abutment protrusion 130 to achieve abutment, which can make the curved pipe 100 axially upward. The radius of curvature of the left and right regions of each pipe unit unit is equal, and since the width H1 of each slit is the same, the bending range of each pipe unit unit is approximately the same, so that the curved pipe 100 achieves a uniform bending shape.

Embodiments of the present application also provide an endoscope, including a handle and the aforementioned insertion portion, and the endoscope includes the beneficial effects of the aforementioned insertion portion, which will not be repeated here.

Wherein, the handle is connected with the insertion part. The user pulls the traction rope 200 through the control handle, and pulls the bending pipe 100 through the traction rope 200 to perform a bending action. Realizing the abutment can make the radius of curvature of the left and right regions of the pipe section units in the axial direction of the curved pipe 100 equal, and since the width H1 of each slit is the same, the bending range of each pipe section unit is approximately the same, so that the curved pipe 100 realizes Uniform curved form.

The endoscope of the embodiment of the present application can be a bronchoscope, pyeloscope, esophagoscope, gastroscope, colonoscope, otoscope, rhinoscope, oral mirror, laryngoscope, colposcope, laparoscope, arthroscope, etc. The kind of endoscope is not specifically limited.

The above-mentioned embodiments of this application focus on the differences between the various embodiments. As long as the different optimization features of the various embodiments are not contradictory, they can be combined to form a better embodiment. Considering the simplicity of the text, here No longer.

The above descriptions are only examples of the present application, and are not intended to limit the present application. For those skilled in the art, various modifications and changes may occur in this application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included within the scope of the claims of the present application.

Claims (10)

1. A bending tube for an endoscope, characterized in that the bending tube comprises a plurality of slits arranged in an axial direction thereof and a plurality of tube segment units divided by the plurality of slits, wherein the plurality of slits have the same width, the plurality of slits comprise first slits arranged in pairs, the plurality of tube segment units comprise first tube segment units positioned between the first slits, the first tube segment units are deformed toward an inner surface side thereof to have guide grooves for setting a haulage rope of the endoscope;

in the pipe joint units on both sides of the first slit, at least one of the opposite sides is provided with an abutment protrusion, and in the extending direction of the first slit, the abutment protrusion is disposed adjacent to the guide groove.

2. A curved tube according to claim 1, wherein the abutment projection comprises an abutment curved surface provided on an abutment side thereof.

3. A bending tube according to claim 1, wherein at least one side surface of the abutment projection on both sides in the extending direction of the first slit is provided with a transitional cambered surface connected with the corresponding tube segment unit.

4. The bending tube according to claim 1, wherein the tube segment units on both sides of the first slit are provided with the abutment protrusions, and the abutment protrusions on the tube segment units on both sides of the first slit are correspondingly arranged or arranged in a staggered manner in the extending direction of the first slit.

5. The bending tube according to claim 4, wherein the abutment projections of the tube segment units on both sides of the first slit are provided correspondingly, and the abutment projections on both sides are the same in height.

6. A bent pipe according to any one of claims 1 to 5, wherein in the pipe section units on both sides of the first slit, one is provided with the abutment projection and the other is provided with a positioning groove corresponding to the abutment projection.

7. A bending tube according to any one of claims 1 to 5, wherein the abutment projections on both sides of the guide groove are symmetrically distributed with respect to the axis of the bending tube on the same tube segment unit.

8. A bent pipe according to any one of claims 1 to 5, wherein the width of any two of the pipe section units is the same.

9. An insertion portion comprising a traction rope and the bending tube according to any one of claims 1 to 8, wherein the traction rope is passed through the guide groove.

10. An endoscope comprising a handle and the insertion portion of claim 9, the handle being connected to the insertion portion.

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